Description:
Our T4 gives compliance to customers who want the 4 most popular sensor options and data capacity in a rugged, simple to operate device.

Overview
T4 is Crowcon’s personal protection solution for detecting the four most common gas hazards:
Carbon Monoxide (CO)
Hydrogen Sulphide (H2S)
Flammable Gases
Oxygen Depletion (O2)
Offering you compliance, robustness and low cost of ownership in a simple to use solution. The large single button and intuitive menu system allows T4 to be operated wearing gloves with minimal training.

Crowcon’s toughest portable yet, T4 is durable by design and includes an integrated rubber boot as standard. An optional clip-on filter cover, which is easily removed and replaced, ensures sensors are protected in the dirtiest environments. Drop tested to 4m and well protected from water ingress through IP65 and IP67 certification, T4 allows uninterrupted working in the most demanding environments.

Now with improved detection of pentane, hexane and other long chain hydrocarbons.

T4 contains a wide range of powerful features to make everyday use easier and safer:
TWA Resume
Unique to T4, the TWA Resume function ensures toxic gas exposure is calculated accurately over an entire shift, even if T4 is switched off for a break or during travel to another site.

When most portable detectors are turned off, the algorithm that assesses TWA exposure assumes that it’s the end of the shift. When turned on again, these detectors act as if it is a new work shift, ignoring all previous measurements. The TWA Resume function however, provides the option to include previous measurements from within the correct time frame.

18 hour battery
With a battery life of 18 hours, T4 allows multiple or longer shifts to be worked between recharging.

Positive Safety
Crowcon’s visual ‘traffic light’ indication, provides constant visual assurance that T4 is operating soundly and conforms to site bump test & calibration policy. The bright green and red Positive Safety LEDs are visible to all and offer a quick, simple and comprehensive indication of monitor status to both the user and others around them.

Specifications:
Size W135 x H80 x D35 mm (5.3 x 3.1 x 1.4in)
Weight 282g (9.9oz)
Durability Drop tested to 4m onto concrete
Alarms Audible >95dB
Bright red/blue visual LEDs
Integrated vibrating alert
Display Front mounted, backlit. Optional 180° flip for easy viewing whilst worn
Logging 130 hours of data logging; Up to 3500 events
Battery Rechargeable Li-ion
18 hour typical runtime
5.5 hour recharge
Operating temperature -20°C to +55°C (-4°F to +131°F)*
Humidity 10 to 95% RH @ 40°C non-condensing
Ingress protection Independently tested to IP65 and IP67
Approvals ATEX: Ex db ia IIC T4 Gb -20 °C ≤ Ta ≤ +55 °C
IECEx: Ex d ia IIC T4 Gb Tamb -20°C to +55°C
UL: Use in hazardous locations Class 1 Div 1, groups A, B, C and D only as to intrinsic safety
INMETRO: Ex db ia IIC T4 Gb -20 °C ≤ Ta ≤ +55 °CMED: Directive 2014/90/EU
Standards EMC Directive 2014/30/EU
Interface USB communications lead
Accessories Included with T4:
Integrated alligator clip and tethering loop

Bump/Calibration plate

Available separately:
Single unit cradle charger, 10 unit cradle charger; Vehicle charger
Clip on filter plate for sensor protection in dusty environments
I-Test automated bump and calibration station

Crowcon Connect Compatible? Yes

Gases and Ranges
Gas Range Resolution
Oxygen (O2) 0-30% Vol. 0.1% Vol.
Flammable 0-100% LEL 1% LEL
Hydrogen sulphide (H2S) 0-100ppm 1ppm
Carbon monoxide (CO) 0-1000ppm 1ppm

Standard Configuration O2: 19.0/23.5%, CH4: 20/40%, CO: 30/100 ppm, H2S: 5/10 ppm
T4-HOCA 4 Gas LEL CH4 (Filtered), O2, H2S, CO
T4-ZOCA 3 Gas LEL CH4 (Filtered), O2, CO
T4-HOZA 3 Gas LEL CH4 (Filtered), O2, H2O
T4-ZOZA 2 Gas LEL CH4 (Filtered), O2
T4-ZOCZ 2 Gas O2, CO
T4-HOCA-H2 4 Gas LEL CH4 (Filtered), O2, H2S, CO (H2 resistant)
T4-ZOCA-H2 3 Gas LEL CH4 (Filtered), O2, CO (H2 resistant)
T4-ZOCZ-H2 2 Gas O2, CO H2 filtered T4 Multi Gas Detector, Standard Config